Method of producing liquid-tight joints for impregnating wood.



No. 803,603. PATENTED NOV. 7, 1905. G.KRON.

METHOD OF PRODUCING LI QUID TIGHT JOINTS FOR IMPREGNATING WOOD.APPLICATION FILED APB.19, 1905.

. UNITED STATES PATENT OFFICE Specification of Letters Patent.

Patented Nov. '7, 1905.

Application filed April 19, 1905. Serial No. 256,456.

To all whom it may concern.-

Be it known that I, GEoRo KRoN, engineer, a subject of the Emperor ofGermany, residing at 15 Rorholmsgade, Copenhagen, Denmark, have inventednew and useful Improvements in Methods of Producing a Liquid- TightJoint Between a Dyeing or Impregnating Vessel and a Block of Wood to beDyed or Impregnated Therein, of which the following is a specification.

The present invention relates to a method of producing a liquid-tightjoint between a dyeing or impregnating vessel and a block or trunk ofwood introduced therein by one end for treatment by means of a liquid tobe forced through it axially. For this purpose there has heretofore beenemployed around the trunk end an elastic ring of rubber or othersuitable material, a method by which, however, a perfectly tight jointhas never been accomplished, particularly when the section of the trunkhas been very irregular. A packing material of said description,moreover, is not practicable'where the dyeing or impregnating liquid isof a comparatively high temperaturefor instance, about 100 centigrade.

According to the present invention a ring of somequickly-solidifying,materialfor instance, molten Iead is cast around thetrunk to be dyed or impregnated, said material in cooling accuratelyclosing up against the circumference of the trunk or block and beingsubsequently tightly connected with the dyeing or impregnating vessel,so that the liquid cannot leak out around the ring whether at its outeror at its inner circumference. Different materials may be employed forthe said ring if only possessing the property of solidifying quicklyaround the trunk. If intended to be used for liquids of a hightemperature, the material should of course be adapted therefor. Lead hasproved to be very suitable.

In the accompanying drawings several forms of the invention areillustrated.

In the form shown in Figure 1 the trunk a, together with the leaden ring6, cast around it, is forced against the impregnating vessel 03, so asto cause the ring to bear on a packing-ring 0 of asbestos or the like,it being noted that the ring 6, owing to its contraction in cooling,will hug so tightly around the trunk that a perfectly tight joint can beproduced by merely pressing the trunk against the impregnating vessel,while at the same time any longitudinal motion of the trunk isprevented. To prevent any movement of the ring along the trunk, the endof the latter, as shown in Fig. 1, can be made tapering.

In the form shown in Fig. 2 the rim of the vessel (Z is turned to asharp edge, and the ring I) is provided with a corresponding depressioninto which the said edge penetrates when the trunk a is forced againstthe ves sel, closure being thereby produced.

In Fig. 3 the ring 6 is provided with a tapering flange, which when thetrunk is forced against the vessel d fits against thecorrespondingly-shaped rim of the latter.

In the form shown in Fig. 4: the trunk a is entirely inclosed in thevessel d. The ring 6 is here forced, by means of the clampingring 6,against the impregnating vessel, which may either be provided with aspecial packing-ring c or, as in the vessels shown in Figs. 2 and 3,have a ring turned off to an edge or a tapered flange.

In Fig. 5 a mechanical device. is shown for forcing the trunk againstthe impregnating vessel d. Two iron bars f are here secured to thevessel, and between these bars a crosshead provided with a clamping-disky can be shifted. The cross-head can be secured by means of pins it,which are inserted into the cross-head through the perforated iron bars.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is In dyeing and impregnating wood in the shape of trunksor blocks, a method of producing a liquid-tight joint between the woodand the dyeing or impregnating vessel, characterized by casting areadily-solidifying material in the shape of a ring around the trunk orblock which is subsequently forced together with the ring against therim or wall of the vessel.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORG KRON. \Vitnesses:

H. TELANDER, J. B. MARKMAN.

